高考数学总复习高考研究课等差数列的3考点-求项求和和判定市赛课公开课一等奖省名师优质课获奖课件.pptx

结 束,等差数列的,3,考点,求项、求和和判定,考点,考查频度,考查角度,等差数列通项,5,年,3,考,求通项或某一项,等差数列前,n,项和,5,年,3,考,求项数,、,求和,等差数列判定,5,年,1,考,探索参数使数列成等差数列,1/29,2/29,3/29,4/29,5/29,6/29,7/29,8/29,方法,解读,适合题型,定义法,对于n2任意自然数，anan1为同一常数an是等差数列,解答题中证实问题,等差中项法,2,a,n,1,a,n,a,n,2,(,n,3,，,n,N,*,),成立,a,n,是等差数列,通项公式法,anpnq(p，q为常数)对任意正整数n都成立an是等差数列,选择、填空题中判定问题,前,n,项和公式法,验证SnAn2Bn(A，B是常数)对任意正整数n都成立an是等差数列,9/29,10/29,11/29,12/29,13/29,14/29,15/29,16/29,17/29,18/29,19/29,20/29,21/29,22/29,23/29,24/29,25/29,26/29,27/29,28/29,29/29,